CN111623757A - CPII control network measuring method in long and large tunnel with receiving well - Google Patents
CPII control network measuring method in long and large tunnel with receiving well Download PDFInfo
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- CN111623757A CN111623757A CN202010451883.3A CN202010451883A CN111623757A CN 111623757 A CN111623757 A CN 111623757A CN 202010451883 A CN202010451883 A CN 202010451883A CN 111623757 A CN111623757 A CN 111623757A
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Abstract
The invention discloses a CPII control network measurement method in a long and large tunnel with a receiving well, and relates to the field of control network measurement of rail transit. The measuring method mainly comprises the following steps of firstly, the CPII outside the hole is retested and encrypted: adopting a GNSS static measurement mode and adopting an edge-connected network to form a strip network connected with a triangle or a geodesic quadrangle, and unifying the adjustment; receiving well relation measurement: adopt a well directional principle to carry out the in-hole and introduce the limit and measure, survey limit angle measurement through the ground total powerstation and calculate the fixed reflection of light of subaerial steel wire and paste the coordinate, the total powerstation below the shaft transmits the reflection of light of shaft below through the steel wire and pastes the coordinate and orient once more, then with the leading-in tunnel of coordinate well-buried point location, CPII measures in the hole: adopting a free station measurement method; fourthly, data processing is carried out; checking the last result. The method provided by the invention has the advantages of good point position stability, high net shape strength and flexible station survey setting; the centering error is reduced, and the angle and distance measurement precision is improved.
Description
Technical Field
The invention relates to the field of measurement of control networks of rail transit, in particular to a CPII control network measurement method in a long and large tunnel with a receiving well.
Background
With the rapid development of railway construction in recent years, a large number of long and large tunnels (long tunnels with the length of more than 10 kilometers per hole) continuously emerge, and are limited by objective conditions, and the current CPII plane control network in the hole can only be arranged in a wire mode. As the result of the CPII is used as the starting reference of a track control network (CPIII), the smoothness of the track is directly influenced by the precision of the CPIII control network, so that the comfort and the safety of the running of the train are influenced. Therefore, the measurement accuracy of the CPII plane control net in the hole is very important. In actual work, as 0.5' grade high-precision total stations are adopted at present, the precision of the CPII plane control network in the four grades of tunnels is easy to meet, and the measurement precision of the CPII plane control network in the holes with the grade of three or two grades of tunnels is not limited, so that long-time rework is involved, great restrictions are brought to work of all parties, the project progress is seriously influenced, and the measurement precision is difficult to guarantee especially for the tunnels with receiving wells. Therefore, how to ensure the measurement accuracy of the CPII plane control network in the large tunnel with the receiving well becomes a new problem.
Disclosure of Invention
The invention provides a method for measuring a CPII plane control network in a long and large tunnel with a receiving well, aiming at solving the problem of measuring accuracy of the CPII plane control network in the long and large tunnel with the receiving well.
The invention is realized by the following technical scheme: a CPII control network measurement method in a long and large tunnel with a receiving well comprises the following steps:
firstly, performing extra-hole CPII retesting and encryption:
before the control network outside the hole is laid, a topographic map of the place of the tunnel and the existing control network measurement data are collected in detail, the topographic features of a tunnel entrance and a receiving well mouth are surveyed on the spot, at least three control points which are mutually seen through are laid at the entrance and the exit of the tunnel and the receiving well mouth, the laying points are selected on the central line near the entrance and the receiving well mouth of the tunnel as far as possible and can be within the range of 50-200 meters, the hole entrance points and the orientation points need to be seen through, the distance between the orientation points is more than 400 meters, and the orientation points are at approximately equal heights so as to eliminate or reduce the influence of the deviation of the vertical line on the observation direction of the tunnel entrance;
the retest and encryption of the CPII outside the tunnel adopts a GNSS static measurement mode, adopts a side-connected network, forms a strip network connected with a triangle or a geoid quadrangle, and unifies adjustment; the CPII control network retest and encryption are observed according to the technical requirements of the three-equal GPS network, and the operation method, the precision index and the use instrument are executed according to the related requirements in the railway engineering measurement specification, as shown in FIG. 9;
II, receiving well contact measurement: the method comprises the following steps of adopting a well orientation principle to carry out in-hole introduction and measurement, calculating out a reflection sticker coordinate fixed by an above-ground steel wire through measuring an angle by a ground total station, transmitting the reflection sticker coordinate below a vertical shaft to be oriented again by the total station below the vertical shaft through the steel wire, and then guiding the coordinate into a point position buried in a tunnel, wherein the transmission of the contact measurement coordinate is completed, and the method is as follows:
preparation: generally, before measurement, the shield machine is disassembled, some construction materials in a tunnel are hoisted, in order to reduce the occupied construction time as much as possible in the connection measurement time, a connection measurement technical scheme is made in advance, and a measuring instrument and related connection measurement tools are prepared in advance, and the method specifically comprises the following steps:
1) welding a heavy hammer weighing 15kg by using a phi 25 steel bar to stretch a steel wire so as to ensure the verticality of the steel wire;
2) the guide suspensions are manufactured by adopting alloy steel pipes as raw materials and are respectively arranged at two ends of a receiving well, and the stability of the suspensions is ensured by ground counterweight; a 15kg heavy hammer is hung underground by a phi 0.5mm high-strength steel wire through a pulley at the top end of a suspension frame, and the heavy hammer below the well is placed in a barrel filled with 3/4 engine oil for stabilizing the swinging of the heavy hammer and the steel wire;
3) sticking the Leica reflector plate on the upper and lower positions of the steel wire at two sides, wherein the cross-shaped vertical line is superposed with the steel wire;
measurement implementation: in order to ensure the measurement accuracy, survey personnel are divided into two groups, TS60 total stations are adopted, one group is used for connecting and measuring surface triangles, the other group is used for observing underground triangles in the hole, and four measured back numbers are measured according to the measurement requirements of three equal lead wires;
obtaining coordinates of a heavy hammer point through coordinate forward calculation, and obtaining coordinates and an azimuth angle of an underground starting point through cosine function check and calculation;
thirdly, measuring the CPII in the hole:
embedding point locations: CPII control points in the tunnel are arranged in pairs at intervals of 200-300 m, the wire attached nodes are located at the positions of the receiving wells, and a node network type is arranged in the point position arranging process; the CPII control points adopt forced centering marks and are arranged on two lining side walls which are 30-50 cm above the top surface of the cable trough;
observation of the CPII in the hole:
1) special data acquisition software capable of automatically recording and calculating is used during measurement; the used total station has the functions of automatic target searching, automatic collimation and automatic observation;
2) the total station is calibrated before observation, during operation, the instrument needs to be observed within an effective detection period, the side length is observed to correct meteorological elements of temperature and air pressure, the temperature reading is accurate to 0.2 ℃, and the air pressure reading is accurate to 0.5 hPa;
3) opening the instrument box and placing for at least 20min before observation to make the temperature of the instrument in the hole consistent with that of the instrument in the hole, and observing at the hole opening observation station at night or on cloudy days; the tunnel is fully ventilated during observation, construction interference is avoided, and dust and fog are avoided;
4) the target prism has enough illumination during observation, the light receiving is uniform and soft, and the light source interference is reduced as much as possible;
5) the free station-finding method point location observation method comprises the following steps: moving the total station according to the in-hole CPII control points, starting to move from the hole, freely setting the station, and then collecting data of the in-hole CPII control points around the station; the angle adopts a full circle direction observation method, the left side of the plate is clockwise, the right side of the plate is anticlockwise, and all directions are observed in sequence to acquire data;
fourthly, data processing: and (3) calculating and carrying out subtraction processing on the acquired data:
firstly, data transmission and preprocessing: transmitting data of field observation records into a computer, performing data sorting, and checking whether standard indexes such as half-test regression homodyne, 2C mutual difference in different test returns in the same direction, poor direction value after zeroing in the same direction and the like meet requirements;
setting adjustment parameters after generating an adjustment file;
③ balancing of free net: checking the internal coincidence precision of the observation data and the compatibility of the observation data with the known coordinates of the control point; the adjustment results include: the general coordinate, the direction adjustment result, the distance adjustment result, the adjustment coordinate and the precision thereof, the weakest point and the precision thereof, the azimuth side length and the relative precision thereof, the weakest edge and the relative precision thereof, the overall information of the plane control network, and the coordinate and the precision thereof after the coordinate conversion.
And fifthly, after the work is finished, checking the result:
firstly, the CPIII encryption network result is checked to meet the standard requirement on site through a total station, and can be used as a calculation control point for CPIII network measurement;
after the control net is attached to a receiving well casting point, the remaining wire part is continuously observed by a free survey station corner intersection net, joint survey is carried out on the control net and the control net of the adjacent mark section, joint survey data is verified seriously, and the joint survey result meets the standard requirement;
precision index:
after the CPII in the hole meets the net leveling difference at the corner of the free survey station, the precision index meets the technical requirements in the table shown in FIG. 10.
Compared with the prior art, the invention has the following beneficial effects: the method for measuring the CPII control network in the long and large tunnel with the receiving well adopts a free station measurement method to measure the CPII control network in the long and large tunnel, and has the advantages of good point position stability, high network strength and flexible station measurement setting; the method of measuring one well orientation in a connection manner is adopted at the receiving well to complete the connection measurement inside and outside the hole; CPII control points are arranged on the walls at the two sides, and a forced centering mode is adopted, so that centering errors are reduced, and the measurement precision of angles and distances is improved; meanwhile, a station setting measurement mode by an intermediate method is adopted, so that the horizontal refraction degree of the sight line can be effectively reduced, and the relative position accuracy of the control point is improved; the measuring points of the free measuring station corner intersection network are connected and measured into the tunnel through the receiving well at the middle and rear section of the tunnel, so that the measuring points of the free measuring station corner intersection network have a good checking function, and the precision of the whole control network is greatly improved; the construction method is flexible and changeable, the tunnel is not influenced by ground conditions after being communicated, only points are made on two lining side walls, a control network can be quickly and effectively laid and observed, the sight line is not easily blocked due to the fact that the sight line is close to the double side walls of the tunnel and is not influenced by side refraction, the field work efficiency is improved by 30% compared with that of the traditional double-wire, the CPII measuring time of the whole tunnel is about 7 days under the condition that the CPII measuring time is not reserved independently, powerful guarantee is provided for smooth follow-up work, a good foundation is laid for follow-up CPIII measurement and track fine adjustment, the quality and the progress of a construction project can meet the node requirements of owners, and good social benefits are achieved.
Drawings
FIG. 1 is a schematic plan view of an extra-hole CPII encryption network in step one of the present invention.
FIG. 2 is a schematic diagram of a receiving well contact measurement in step two of the present invention.
FIG. 3 is a schematic diagram of the burying of CPII in holes in step three of the present invention, wherein the burying of points on the two-sided wall is shown as circles at B.
FIG. 4 is a schematic diagram of a free station method observation method of the present invention, in which: ● is a free measuring station, ← is the observation direction, O is the in-hole CPII control point, a-solidup is the out-hole CPI/CPII control point, and Delta is the in-hole construction control point.
FIG. 5 is a schematic diagram of the setting processing parameters of the Survery Adjust computer software.
Fig. 6 is a plan view of a east jin tunnel according to an embodiment of the present invention.
FIG. 7 is a block diagram of the adjustment coordinates and its precision table according to an embodiment of the present invention.
Fig. 8 is a plane net adjustment point position accuracy analysis diagram calculated by computer software according to an embodiment of the present invention.
FIG. 9 is a table of basic specifications for GPS measurement at various stages in step one of the present invention.
FIG. 10 is a table of the essential specifications of the CPII free survey station corner intersection network in the hole in step five of the present invention;
FIG. 11 is a table of results of the joint test data according to the embodiment of the present invention.
Detailed Description
The present invention is further illustrated by the following specific examples.
The section DK0+050-DK1+200 of the southwest circular line Dongjin tunnel is constructed by an open cut method, the section DK1+200-DK6+127 adopts shield tunneling, the position DK6+100 is a receiving well position, the section DK6+127-DK7+239 adopts a hidden cut method for construction, the shield receiving well is used as a starting point, the end point is the north side of the Xiyu street (a fifteen-ferrum-five-bureau intersection point), and the full length is 7239m, as shown in FIG. 6. A southwest circular line east-jin tunnel construction plan view is shown in fig. 6; the construction of the open excavation section and the shield construction section of the tunnel is completed in 2019 and 4 months, about 40 meters of the underground excavation section is left and is not communicated with the adjacent standard section, the ballastless track construction of the open excavation section and the shield construction section is firstly organized by considering the opening node, a plurality of problems exist in the tunnel at that time, finally, the fact that the measurement of the CPII control network of the open excavation section and the shield construction section is completed by a well directional connection measurement and free station measurement method is determined, after the construction of the underground excavation section is completed, the CPII control network measurement of the section is completed by the free station measurement method, and two ends of the section are respectively connected with the shield construction section and the adjacent standard section in a lap joint mode. A CPII control network measurement method in a long and large tunnel with a receiving well comprises the following steps:
firstly, performing extra-hole CPII retesting and encryption:
before the control network outside the hole is laid, a topographic map of the place of the tunnel and the existing control network measurement data are collected in detail, the topographic features of a tunnel entrance and a receiving well mouth are surveyed on the spot, at least three control points which are mutually seen through are laid at the entrance and the exit of the tunnel and the receiving well mouth, the laying points are selected on the central line near the entrance and the receiving well mouth of the tunnel as far as possible and can be within the range of 50-200 meters, the hole entrance points and the orientation points need to be seen through, the distance between the orientation points is more than 400 meters, and the orientation points are at approximately equal heights so as to eliminate or reduce the influence of the deviation of the vertical line on the observation direction of the tunnel entrance;
the retest and encryption of the CPII outside the tunnel adopts a GNSS static measurement mode, adopts a side-connected network, forms a strip network connected with a triangle or a geoid quadrangle, and unifies the adjustment, as shown in figure 1; the CPII control network retest and encryption are observed according to the technical requirements of the three-equal GPS network, and the operation method, the precision index and the use instrument are executed according to the related requirements in the railway engineering measurement specification, as shown in FIG. 9;
II, receiving well contact measurement:
the Dongjin tunnel receiving well is a rectangular well 27 meters long, 22 meters wide and 27 meters deep, if a common lead is adopted for measurement, the measurement error is increased due to overlarge vertical angle, so that the measurement while introducing is carried out in a hole by adopting a one-well orientation principle, the reflection sticker coordinate fixed by the steel wire on the ground is calculated by measuring the edge and measuring the angle by using a ground total station, the total station below the shaft is transmitted to the reflection sticker coordinate below the shaft through the steel wire for orientation again, then the coordinate is guided into the embedded point position in the tunnel, and the transmission of the relation measurement coordinate is finished, as shown in fig. 2, the method specifically comprises the following steps:
preparation: generally, before measurement, the shield machine is disassembled, some construction materials in a tunnel are hoisted, in order to reduce the occupied construction time as much as possible in the connection measurement time, a connection measurement technical scheme is made in advance, and a measuring instrument and related connection measurement tools are prepared in advance, and the method specifically comprises the following steps:
1) welding a heavy hammer weighing 15kg by using a phi 25 steel bar to stretch a steel wire so as to ensure the verticality of the steel wire;
2) the guide suspensions are manufactured by adopting alloy steel pipes as raw materials and are respectively arranged at two ends of a receiving well, and the stability of the suspensions is ensured by ground counterweight; a 15kg heavy hammer is hung underground by a phi 0.5mm high-strength steel wire through a pulley at the top end of a suspension frame, and the heavy hammer below the well is placed in a barrel filled with 3/4 engine oil for stabilizing the swinging of the heavy hammer and the steel wire;
3) sticking the Leica reflector plate on the upper and lower positions of the steel wire at two sides, wherein the cross-shaped vertical line is superposed with the steel wire;
measurement implementation: in order to ensure the measurement accuracy, survey personnel are divided into two groups, TS60 total stations are adopted, one group is used for connecting and measuring surface triangles, the other group is used for observing underground triangles in the hole, and four measured back numbers are measured according to the measurement requirements of three equal lead wires; in fig. 2, T1, T2, T3 and T4 are the observation points of contact measurement, AB is the point of orientation outside the hole, and CD is the point of orientation inside the hole;
obtaining coordinates of a heavy hammer point through coordinate forward calculation, and obtaining coordinates and an azimuth angle of an underground starting point through cosine function check and calculation;
thirdly, measuring the CPII in the hole:
embedding point locations: CPII control points in the tunnel are arranged in pairs at intervals of 200-300 m, the wire attached nodes are located at the positions of the receiving wells, and a node network type is arranged in the point position arranging process; the CPII control points adopt forced centering marks and are arranged on two lining side walls which are 30-50 cm above the top surface of the cable trough, and point positions are buried in a circle B in the figure 3;
observation of the CPII in the hole:
1) special data acquisition software capable of automatically recording and calculating is used during measurement; the used total station has the functions of automatic target search, automatic collimation and automatic observation, and the measurement uses the come card TS60 (0.5' level) total station and TPSSurvey data acquisition software;
2) the total station is calibrated before observation, during operation, the instrument needs to be observed within an effective detection period, the side length is observed to correct meteorological elements of temperature and air pressure, the temperature reading is accurate to 0.2 ℃, and the air pressure reading is accurate to 0.5 hPa;
3) opening the instrument box and placing for at least 20min before observation to make the temperature of the instrument in the hole consistent with that of the instrument in the hole, and observing at the hole opening observation station at night or on cloudy days; the tunnel is fully ventilated during observation, construction interference is avoided, and dust and fog are avoided;
4) the target prism has enough illumination during observation, the light receiving is uniform and soft, and the light source interference is reduced as much as possible;
5) the free station-finding method point location observation method comprises the following steps: as shown in fig. 4, the total station is moved according to the in-hole CPII control points, the station is freely set after the total station starts to move from the hole opening, and then the data of the in-hole CPII control points around the station is collected; the angle adopts a full circle direction observation method, the left side of the plate is clockwise, the right side of the plate is anticlockwise, and all directions are observed in sequence to acquire data;
fourthly, data processing: the calculation and adjustment processing are carried out on the collected data, the CPII plane data calculation and adjustment processing adopt high-speed railway general adjustment software Survey Adjust developed by the union of the Federal-Federal and the southwest Congress:
firstly, data transmission and preprocessing: transmitting data of field observation records into a computer, performing data sorting, and checking whether standard indexes such as half-test regression homodyne, 2C mutual difference in different test returns in the same direction, poor direction value after zeroing in the same direction and the like meet requirements;
secondly, setting adjustment parameters after generating an adjustment file, as shown in FIG. 5;
③ balancing of free net: checking the internal coincidence precision of the observation data and the compatibility of the observation data with the known coordinates of the control point; the adjustment results include: general coordinates, direction adjustment results, distance adjustment results, adjustment coordinates and precision thereof, weakest points and precision thereof, azimuth side length and relative precision thereof, weakest edges and relative precision thereof, general information of the plane control network, coordinates after coordinate conversion and precision thereof, as shown in fig. 7.
And fifthly, after the work is finished, checking the result:
firstly, the CPIII encryption network result is checked to meet the standard requirement on site through a total station, and can be used as a calculation control point for CPIII network measurement;
after the control network is attached to the receiving well casting points, the remaining conductor part is continuously observed by a free survey station corner intersection network, joint survey is carried out on the control network and the control network of the adjacent mark sections, joint survey data is seriously checked, the joint survey result meets the standard requirement, and the joint survey result is shown in figure 11;
precision index:
after the CPII in the hole meets the net leveling difference at the corner of the free survey station, the precision index meets the technical requirements in the table shown in FIG. 10.
Dongjin tunnel, error in angle measurement:
M0= ±
= ±
= +/-1.60 (seconds)
Error in ranging: mD=±1.13mm；
The maximum value of the accuracy of the CPII measurement adjustment point position in the Dongxin tunnel is 1.82mm, the minimum value is 0.68mm, the average value is 1.28mm, the requirement of railway engineering measurement specification is met, and the accuracy chart of the adjustment point position is shown in figure 8.
In the specific implementation process of this embodiment: the construction method and the quality requirement meet the requirements of railway engineering measurement Specifications TB 10101-2018; instruments that are not tested and certified, and that have defective parts, are strictly prohibited. All measuring instruments are required to be checked regularly according to regulations, and the measuring instruments are guaranteed to be used in effective checking periods; when the error is found to be too large in use and does not meet the precision requirement of an instrument, the reason should be found out in time for checking and adjusting, and the instrument cannot be used continuously before the reason is found to be too large; the measuring personnel need to be relatively fixed, and the continuity of data information is guaranteed. The special measuring instrument is used by a special person, maintained by a professional institution and checked and calibrated by the professional institution. The measuring equipment, components and the like are checked and calibrated before use and can be used after qualification; in a long tunnel, the visibility of air is low, and the normal propagation of laser is influenced by excessive impurities in the air, so that the measurement precision is influenced. When in measurement, on one hand, water is sprayed on the tunnel ground, and on the other hand, the tunnel ground is coordinately shut down, so that smoke and dust of the vehicle are prevented. When the cold air and the hot air are converged, local air disturbance can be generated, and the disturbance can cause the laser propagation to generate certain distortion deformation, so that the measurement precision is influenced. The influence of temperature difference mainly occurs at the intersection position of internal air and external air, such as a tunnel portal, an inclined shaft, a ventilation opening and the like. Measuring near the hole in the evening or cloudy day as far as possible; and after the measurement is finished, the instrument and the meter are checked, maintenance and storage work is done, data arrangement and information feedback are carried out in time, the checking result is found to be unqualified, the reason is analyzed, measures are made, and the accuracy is ensured to meet the requirement.
The scope of the invention is not limited to the above embodiments, and various modifications and changes may be made by those skilled in the art, and any modifications, improvements and equivalents within the spirit and principle of the invention should be included in the scope of the invention.
Claims (3)
1. A CPII control network measuring method in a long and large tunnel with a receiving well is characterized in that: the method comprises the following steps:
firstly, performing extra-hole CPII retesting and encryption:
before the control network outside the tunnel is laid, a topographic map of the tunnel and existing control network measurement data are collected in detail, the topographic features of a tunnel entrance and a receiving well mouth are surveyed on site, at least three control points which are mutually communicated are laid at the tunnel entrance and the receiving well mouth, the laying points are within the range of 50-200 meters of the central line of the tunnel entrance and the receiving well mouth, the tunnel entrance point and the orientation points are required to be communicated, and the distance between the orientation points is more than 400 meters;
the retest and encryption of the CPII outside the tunnel adopts a GNSS static measurement mode, adopts a side-connected network, forms a strip network connected with a triangle or a geoid quadrangle, and unifies adjustment;
II, receiving well contact measurement: the method comprises the following steps of adopting a well orientation principle to carry out in-hole introduction and measurement, calculating out a reflection sticker coordinate fixed by an above-ground steel wire through measuring an angle by a ground total station, transmitting the reflection sticker coordinate below a vertical shaft to be oriented again by the total station below the vertical shaft through the steel wire, and then guiding the coordinate into a point position buried in a tunnel, wherein the transmission of the contact measurement coordinate is completed, and the method is as follows:
preparation:
1) welding a heavy hammer weighing 15kg by using a phi 25 steel bar to stretch a steel wire so as to ensure the verticality of the steel wire;
2) the guide suspensions are manufactured by adopting alloy steel pipes as raw materials and are respectively arranged at two ends of a receiving well, and the stability of the suspensions is ensured by ground counterweight; a 15kg heavy hammer is hung underground by a phi 0.5mm high-strength steel wire through a pulley at the top end of a suspension frame, and the heavy hammer below the well is placed in a barrel filled with 3/4 engine oil for stabilizing the swinging of the heavy hammer and the steel wire;
3) sticking the Leica reflector plate on the upper and lower positions of the steel wire at two sides, wherein the cross-shaped vertical line is superposed with the steel wire;
measurement implementation: in order to ensure the measurement accuracy, survey personnel are divided into two groups, TS60 total stations are adopted, one group is used for connecting and measuring surface triangles, the other group is used for observing underground triangles in the hole, and four measured back numbers are measured according to the measurement requirements of three equal lead wires;
obtaining coordinates of a heavy hammer point through coordinate forward calculation, and obtaining coordinates and an azimuth angle of an underground starting point through cosine function check and calculation;
thirdly, measuring the CPII in the hole:
embedding point locations: CPII control points in the tunnel are arranged in pairs at intervals of 200-300 m, the wire attached nodes are located at the positions of the receiving wells, and a node network type is arranged in the point position arranging process; the CPII control points adopt forced centering marks and are arranged on two lining side walls which are 30-50 cm above the top surface of the cable trough;
observation of the CPII in the hole:
1) special data acquisition software capable of automatically recording and calculating is used during measurement, and the adopted software must be formally identified through a related department of a railway department; the used total station has the functions of automatic target searching, automatic collimation and automatic observation;
2) the total station is calibrated before observation, during operation, the instrument needs to be observed within an effective detection period, the correction of meteorological elements such as temperature, air pressure and the like is carried out on side length observation, the temperature reading is accurate to 0.2 ℃, and the air pressure reading is accurate to 0.5 hPa;
3) opening the instrument box and placing for at least 20min before observation to make the temperature of the instrument in the hole consistent with that of the instrument in the hole, and observing at night or on cloudy days by a hole opening observation station; the tunnel is fully ventilated during observation, construction interference is avoided, and dust and fog are avoided;
4) the target prism has enough illumination during observation, the light receiving is uniform and soft, and the light source interference is reduced;
5) the free station-finding method point location observation method comprises the following steps: moving the total station according to the in-hole CPII control points, starting to move from the hole, freely setting the station, and then collecting data of the in-hole CPII control points around the station; the angle adopts a full circle direction observation method, the left side of the plate is clockwise, the right side of the plate is anticlockwise, and all directions are observed in sequence to acquire data;
fourthly, data processing: and (3) calculating and carrying out subtraction processing on the acquired data:
firstly, data transmission and preprocessing: transmitting data of field observation records into a computer, performing data arrangement, and checking half-test regression homodyne, 2C mutual difference in different test returns in the same direction and direction value difference after zeroing in the same direction;
setting adjustment parameters after generating an adjustment file;
③ balancing of free net: checking the internal coincidence precision of the observation data and the compatibility of the observation data with the known coordinates of the control point; the adjustment results include: the general coordinate, the direction adjustment result, the distance adjustment result, the adjustment coordinate and the precision thereof, the weakest point and the precision thereof, the azimuth side length and the relative precision thereof, the weakest edge and the relative precision thereof, the overall information of the plane control network, and the coordinate and the precision thereof after the coordinate conversion.
2. A method for measuring a CPII control network in a long and large tunnel with a receiving well according to claim 1, characterized in that: in the in-tunnel CPII observation in the third step, a come card TS60 total station and TPSSurvey data acquisition software are adopted.
3. A method for measuring a CPII control network in a long and large tunnel with a receiving well according to claim 1, characterized in that: in the fourth step, the CPII plane data is calculated and adjustment processing adopts high-speed railway general adjustment software SurveyAdjust.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111809466A (en) * | 2020-09-14 | 2020-10-23 | 深圳大学 | Retest method and device for CPIII control network of high-speed railway |
| CN112379397A (en) * | 2020-11-24 | 2021-02-19 | 湖北省水利水电规划勘测设计院 | Measuring method for reducing errors in azimuth angle of tunnel ground control network |
| CN113532403A (en) * | 2021-07-29 | 2021-10-22 | 中交第一航务工程局有限公司 | Tunnel long-side wire penetration measuring method |
| CN113654508A (en) * | 2021-06-15 | 2021-11-16 | 中铁电气化局集团北京建筑工程有限公司 | Method for improving precision wire measurement efficiency |
| CN114111735A (en) * | 2021-11-02 | 2022-03-01 | 上海市基础工程集团有限公司 | High-precision control measurement method for shield tunnel in scientific experiment |
| CN114413870A (en) * | 2022-03-28 | 2022-04-29 | 中交第一航务工程局有限公司 | Tunnel multi-line lead penetration measuring method |
| CN114485584A (en) * | 2021-12-30 | 2022-05-13 | 中铁第六勘察设计院集团有限公司 | Subway interval joint measurement method based on reverse joint measurement |
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| CN115539129A (en) * | 2022-10-17 | 2022-12-30 | 中铁二局第二工程有限公司 | Construction and operation integrated control network in tunnel and construction method thereof |
| CN116147596A (en) * | 2023-04-21 | 2023-05-23 | 中交第一航务工程局有限公司 | Left-right lane penetration measuring method for immersed tunnel |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111809466A (en) * | 2020-09-14 | 2020-10-23 | 深圳大学 | Retest method and device for CPIII control network of high-speed railway |
| CN112379397A (en) * | 2020-11-24 | 2021-02-19 | 湖北省水利水电规划勘测设计院 | Measuring method for reducing errors in azimuth angle of tunnel ground control network |
| CN112379397B (en) * | 2020-11-24 | 2024-04-16 | 湖北省水利水电规划勘测设计院 | Measurement method for reducing error in azimuth angle of tunnel ground control network |
| CN113654508A (en) * | 2021-06-15 | 2021-11-16 | 中铁电气化局集团北京建筑工程有限公司 | Method for improving precision wire measurement efficiency |
| CN113532403A (en) * | 2021-07-29 | 2021-10-22 | 中交第一航务工程局有限公司 | Tunnel long-side wire penetration measuring method |
| CN114111735B (en) * | 2021-11-02 | 2024-03-29 | 上海市基础工程集团有限公司 | High-precision control measurement method for shield tunnel in scientific experiment |
| CN114111735A (en) * | 2021-11-02 | 2022-03-01 | 上海市基础工程集团有限公司 | High-precision control measurement method for shield tunnel in scientific experiment |
| CN114485584A (en) * | 2021-12-30 | 2022-05-13 | 中铁第六勘察设计院集团有限公司 | Subway interval joint measurement method based on reverse joint measurement |
| CN114485584B (en) * | 2021-12-30 | 2023-05-05 | 中铁第六勘察设计院集团有限公司 | Subway interval joint measurement method based on reverse connection measurement |
| CN114608546A (en) * | 2022-02-28 | 2022-06-10 | 上海市基础工程集团有限公司 | Device and method for measuring penetration of ultra-long distance shield tunnel |
| CN114413870A (en) * | 2022-03-28 | 2022-04-29 | 中交第一航务工程局有限公司 | Tunnel multi-line lead penetration measuring method |
| CN115539129A (en) * | 2022-10-17 | 2022-12-30 | 中铁二局第二工程有限公司 | Construction and operation integrated control network in tunnel and construction method thereof |
| CN116147596A (en) * | 2023-04-21 | 2023-05-23 | 中交第一航务工程局有限公司 | Left-right lane penetration measuring method for immersed tunnel |
| CN116147596B (en) * | 2023-04-21 | 2023-06-27 | 中交第一航务工程局有限公司 | Left-right lane penetration measuring method for immersed tunnel |
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